The end of the cable was left poking out of the wall.
句中的 was left 作何解释?poking为什么是ing形式?
leave 有个用法是用于 leave sb doing sth, 意为“让某人做某事(处于做某事的状态中)”。如:
His letter left me feeling pretty bad. 他的信让我感到很难受。
They walked off and left me sitting there all by myself. 他们走开了,让我孤零零一个人坐在那儿。
你的句子就是这类句式的被动式。